1019315261 has 2 divisors, whose sum is σ = 1019315262. Its totient is φ = 1019315260.

The previous prime is 1019315207. The next prime is 1019315293. The reversal of 1019315261 is 1625139101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1017227236 + 2088025 = 31894^2 + 1445^2 .

It is an emirp because it is prime and its reverse (1625139101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1019315261 - 2¹⁴ = 1019298877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1019315201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509657630 + 509657631.

It is an arithmetic number, because the mean of its divisors is an integer number (509657631).

Almost surely, 2^1019315261 is an apocalyptic number.

It is an amenable number.

1019315261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019315261 is an equidigital number, since it uses as much as digits as its factorization.

1019315261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1019315261 is about 31926.7170407482. The cubic root of 1019315261 is about 1006.3974062515.

The spelling of 1019315261 in words is "one billion, nineteen million, three hundred fifteen thousand, two hundred sixty-one".